| /* ldexp.h - |
| Copyright (C) 1991-2024 Free Software Foundation, Inc. |
| |
| This file is part of the GNU Binutils. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #ifndef LDEXP_H |
| #define LDEXP_H |
| |
| /* The result of an expression tree */ |
| typedef struct { |
| bfd_vma value; |
| char *str; |
| asection *section; |
| bool valid_p; |
| } etree_value_type; |
| |
| enum node_tree_enum { |
| etree_binary, |
| etree_trinary, |
| etree_unary, |
| etree_name, |
| etree_assign, |
| etree_provide, |
| etree_provided, |
| etree_value, |
| etree_assert, |
| etree_rel |
| }; |
| |
| typedef struct { |
| int node_code; |
| unsigned int lineno; |
| const char *filename; |
| enum node_tree_enum node_class; |
| } node_type; |
| |
| typedef union etree_union { |
| node_type type; |
| struct { |
| node_type type; |
| union etree_union *lhs; |
| union etree_union *rhs; |
| } binary; |
| struct { |
| node_type type; |
| union etree_union *cond; |
| union etree_union *lhs; |
| union etree_union *rhs; |
| } trinary; |
| struct { |
| node_type type; |
| const char *dst; |
| union etree_union *src; |
| bool hidden; |
| } assign; |
| struct { |
| node_type type; |
| union etree_union *child; |
| } unary; |
| struct { |
| node_type type; |
| const char *name; |
| } name; |
| struct { |
| node_type type; |
| bfd_vma value; |
| char *str; |
| } value; |
| struct { |
| node_type type; |
| asection *section; |
| bfd_vma value; |
| } rel; |
| struct { |
| node_type type; |
| union etree_union *child; |
| const char *message; |
| } assert_s; |
| } etree_type; |
| |
| /* Expression evaluation control. */ |
| typedef enum |
| { |
| /* Parsing linker script. Will only return "valid" for expressions |
| that evaluate to a constant. */ |
| lang_first_phase_enum, |
| /* Prior to section sizing. */ |
| lang_mark_phase_enum, |
| /* During section sizing. */ |
| lang_allocating_phase_enum, |
| /* During assignment of symbol values when relaxation in progress. */ |
| lang_assigning_phase_enum, |
| /* Final assignment of symbol values. */ |
| lang_final_phase_enum, |
| /* Run after symbol values have been fixed, for lang_map. */ |
| lang_fixed_phase_enum |
| } lang_phase_type; |
| |
| union lang_statement_union; |
| |
| enum phase_enum { |
| /* We step through the first four states here as we see the |
| associated linker script tokens. */ |
| exp_seg_none, |
| exp_seg_align_seen, |
| exp_seg_relro_seen, |
| exp_seg_end_seen, |
| /* The last three states are final, and affect the value returned |
| by XXX_SEGMENT_ALIGN. */ |
| exp_seg_relro_adjust, |
| exp_seg_adjust, |
| exp_seg_done |
| }; |
| |
| enum relro_enum { |
| exp_seg_relro_none, |
| exp_seg_relro_start, |
| exp_seg_relro_end, |
| }; |
| |
| struct lang_output_section_statement_struct; |
| |
| typedef struct { |
| enum phase_enum phase; |
| |
| bfd_vma base, relro_offset, relro_end, end; |
| /* MAXPAGESIZE and COMMMONPAGESIZE as passed to DATA_SEGMENT_ALIGN. |
| relropagesize sets the alignment of the end of the relro segment. */ |
| bfd_vma maxpagesize, commonpagesize, relropagesize; |
| |
| enum relro_enum relro; |
| |
| union lang_statement_union *relro_start_stat; |
| union lang_statement_union *relro_end_stat; |
| } seg_align_type; |
| |
| struct ldexp_control { |
| /* Modify expression evaluation depending on this. */ |
| lang_phase_type phase; |
| |
| /* Principally used for diagnostics. */ |
| bool assigning_to_dot; |
| |
| /* Set if the current expression used "dot", SEGMENT_START or |
| ORIGIN, but not ABSOLUTE or combined symbols in a way that forces |
| an absolute result. Used in tracking symbols assigned from dot |
| outside of output section statements, in order to later convert |
| them from absolute. */ |
| bool rel_from_abs; |
| |
| /* If evaluating an assignment, the destination. Cleared if an |
| etree_name NAME matches this, to signal a self-assignment. |
| Note that an etree_name DEFINED does not clear this field, nor |
| does the false branch of a trinary expression. */ |
| const char *assign_name; |
| |
| /* If evaluating an assignment, the source if it is an expression |
| referencing single etree_name NAME, or a trinary expression where |
| the true branch references a single etree_name NAME. */ |
| struct bfd_link_hash_entry *assign_src; |
| |
| /* Working results. */ |
| etree_value_type result; |
| bfd_vma dot; |
| |
| /* Current dot and section passed to ldexp folder. SECTION will be |
| bfd_abs_section for expressions outside of an output section |
| statement. */ |
| bfd_vma *dotp; |
| asection *section; |
| |
| /* Last output section statement. For expressions within an output |
| section statement, this will be the current output section |
| statement being processed. */ |
| struct lang_output_section_statement_struct *last_os; |
| |
| /* State machine and results for DATASEG. */ |
| seg_align_type dataseg; |
| }; |
| |
| extern struct ldexp_control expld; |
| |
| /* A maps from a segment name to a base address. */ |
| typedef struct segment_struct { |
| /* The next segment in the linked list. */ |
| struct segment_struct *next; |
| /* The name of the sgement. */ |
| const char *name; |
| /* The base address for the segment. */ |
| bfd_vma value; |
| /* True if a SEGMENT_START directive corresponding to this segment |
| has been seen. */ |
| bool used; |
| } segment_type; |
| |
| /* The segments specified by the user on the command-line. */ |
| extern segment_type *segments; |
| |
| typedef struct _fill_type fill_type; |
| |
| etree_type *exp_intop |
| (bfd_vma); |
| etree_type *exp_bigintop |
| (bfd_vma, char *); |
| etree_type *exp_relop |
| (asection *, bfd_vma); |
| void exp_fold_tree |
| (etree_type *, struct lang_output_section_statement_struct *, |
| asection *, bfd_vma *); |
| void exp_fold_tree_no_dot |
| (etree_type *, struct lang_output_section_statement_struct *); |
| etree_type *exp_binop |
| (int, etree_type *, etree_type *); |
| etree_type *exp_trinop |
| (int,etree_type *, etree_type *, etree_type *); |
| etree_type *exp_unop |
| (int, etree_type *); |
| etree_type *exp_nameop |
| (int, const char *); |
| etree_type *exp_assign |
| (const char *, etree_type *, bool); |
| etree_type *exp_defsym |
| (const char *, etree_type *); |
| etree_type *exp_provide |
| (const char *, etree_type *, bool); |
| etree_type *exp_assert |
| (etree_type *, const char *); |
| void exp_print_tree |
| (etree_type *); |
| bfd_vma exp_get_vma |
| (etree_type *, struct lang_output_section_statement_struct *, bfd_vma, char *); |
| int exp_get_power |
| (etree_type *, struct lang_output_section_statement_struct *, char *); |
| fill_type *exp_get_fill |
| (etree_type *, fill_type *, char *); |
| bfd_vma exp_get_abs_int |
| (etree_type *, int, char *); |
| void ldexp_init (void); |
| void ldexp_finalize_syms (void); |
| bool ldexp_is_final_sym_absolute (const struct bfd_link_hash_entry *); |
| void ldexp_finish (void); |
| |
| #endif |